Alexios II Komnenos in the context of "Béla III of Hungary"

The Byzantine Empire was ruled by emperors of the Komnenos dynasty for a period of 104 years, from 1081 to about 1185. The Komnenian (also spelled Comnenian) period comprises the reigns of five emperors, Alexios I, John II, Manuel I, Alexios II and Andronikos I. It was a period of sustained, though ultimately incomplete, restoration of the military, territorial, economic and political position of the Byzantine Empire.

Byzantium under the Komnenoi played a key role in the history of the Crusades in the Holy Land, while also exerting enormous cultural and political influence in Europe, the Near East, and the lands around the Mediterranean Sea. The Komnenian emperors, particularly John and Manuel, exerted great influence over the Crusader states of Outremer, whilst Alexios I played a key role in the course of the First Crusade, which he helped bring about.

Andronikos I Komnenos (Greek: Ἀνδρόνικος Κομνηνός, romanized: Andrónikos Komnēnós; c. 1118/1120 – 12 September 1185), Latinized as Andronicus I Comnenus, was Byzantine emperor from 1183 to 1185. A nephew of John II Komnenos (r. 1118–1143), Andronikos rose to fame in the reign of his cousin Manuel I Komnenos (r. 1143–1180), during which his life was marked by political failures, adventures, scandalous romances, and rivalry with the emperor.

After Manuel's death in 1180, the elderly Andronikos rose to prominence as the accession of the young Alexios II Komnenos led to power struggles in Constantinople. In 1182, Andronikos seized power in the capital, ostensibly as a guardian of the young emperor. Andronikos swiftly and ruthlessly eliminated his political rivals, including Alexios II's mother and regent, Maria of Antioch. In September 1183, Andronikos was crowned as co-emperor and had Alexios murdered, assuming power in his own name. Andronikos staunchly opposed the powerful Byzantine aristocracy and enacted brutal measures to curb their influence. Although he faced several revolts and the empire became increasingly unstable, his reforms had a favorable effect on the common citizenry. The capture of Thessaloniki by William II of Sicily in 1185 turned the people of Constantinople against Andronikos, who was captured and brutally murdered.

Maria Komnene (or Comnena) (Greek: Μαρία Κομνηνή, Maria Komnēnē; Constantinople, March 1152 – July 1182) was the eldest daughter of the Emperor Manuel I Komnenos by his first wife, Bertha of Sulzbach. She was known as the Porphyrogennete (Πορφυρογέννητη) or Porphyrogenita because she had been "born in the Purple Chamber", i.e. born in the Palace at Constantinople to the wife of a reigning emperor.

Maria was probably born in March 1152. According to Cinnamus, she was given the title Augusta at her birth. In 1163 she was engaged to the future King Béla III of Hungary; Manuel, no longer expecting to father a legitimate son, was at that time ready to designate Béla (whom he had given the new court dignity of despotes and had renamed "Alexios") as his eventual successor. This engagement was broken off in 1169, soon after Manuel's son Alexios was born. Maria was then engaged to King William II of Sicily, but this engagement, too, was broken off by her father. Finally, in 1179, Maria was married to Renier of Montferrat, who was renamed "John" and given the title of Caesar.

Maria of Antioch (Greek: Μαρία; 1145–1182) was a Byzantine empress by marriage to Byzantine Emperor Manuel I Komnenos, and regent during the minority of her son porphyrogennetos Alexios II Komnenos from 1180 until 1182.